FR2462365A1 - ACCUMULATOR TRANSPORTER - Google Patents

Abstract

THE CARRIER INCLUDES A CHASSIS 2, A CARRIER ROLLER SOLE 3 ON WHICH THE LOADS REST AND MOVE, AT LEAST ONE ENDLESS DRIVE BELT 7 MOVING CONTINUOUSLY UNDER THE CARRIER ROLLERS AND ENSURING THE ROTATION DRIVE OF THE latter BY FRICTION, PRESSURE ROTORS 6 WITH OFFSET PIVOTING AXES SUPPORTING THE SAID DRIVE BAND AND INTENDED TO APPLY IT AGAINST THE CARRIER ROLLERS, AND LOAD PRESENCE SENSORS 9 DISTRIBUTED ALONG THE CARRIER BASE BETWEEN THE CARRIER ROLLERS, EACH PRESSURE ROTOR INCLUDING A SENSITIVELY CYLINDRICAL SHAPED HOUSING, SWIVELING AROUND AN OFFSET SHAFT AND AT LEAST ONE PRESSURE ROLLER OR CAM ROTATING INSIDE THE HOUSING, THE ANGULAR WALL OF THE SECOND HOUSING BY FURNISHING THE SECOND FURNITURE ROTATING WITHIN THE CASE, THE ANGULAR WALL OF THE SECOND HOUSING BY THE SECOND FIXING EXCEED THE PERIPHERAL SURFACE OF THE ROLLER, THE SAID WINDOWS ARE BOTH LOCATED ON THE SAME SIDE IN RELATION TO THE DIAMETRAL PLAN OF THE BOX PASSING THROUGH THE ROTOR PIVOT AXLE. APPLICATION TO THE MECHANICAL HANDLING OF INSULATED LOADS.

Description

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  The present invention relates to an accumulator conveyor for the mechanical handling of insulated loads. In order to regulate the flow rate of the product flow transported on an accumulator whose input rate varies randomly, queues are created which must be able to fill and empty without any need

  to stop the carrier himself.

  There are many known methods of accumula-

  lation of loads on a carrier, the simplest using the gravity of the loads themselves. The major disadvantage of this method is that it creates a pressure of

  line proportional to the slope and total weight of the

  accumulated funds. If a motorized conveyor is used and the loads are skated on the conveyor element,

  we also obtain a significant line pressure which de-

  hangs from the friction of the loads on the conveying element.

  According to other known accumulation methods,

  can operate the carrier in step by step

  an upstream carrier while a downstream carrier

  empty or using as many modules of trans-

  carrier that there are charges to accumulate.

  Among the known accumulating conveyors are the disengageable conveyors with automatic disengagement by reaction rollers simultaneously solicited by an element

  and blocked by the accumulating charges.

  These carriers have the major disadvantage of being difficult to adjust and require extra thicknesses on

  the drive element to ensure the periodic restart

  rolls, creating a certain line pressure.

  There are also disengageable

  positive detector of the presence of the loads, these detectors making it possible to disengage a section of the transporter when a load acts on him, or contrary to engage this section

  when the charge has moved away. On these devices, the function

  The clutch disengagement is effected by an actuating device which is either electrical, pneumatic or hydraulic. Although efficient, these devices

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  have the great disadvantage of being of a prohibitive cost

bitif.

  On the other hand, clutch-release systems

  The mechanics are generally simpler, therefore more economical and more robust. Accumulation devices of this type are already known, in particular by patent FR 1,225,981 which describes a

  carrier having a sole with rollers on which

  place the loads and a central driving band which

  where the drive is provided section by section by raising the belt above the running surface of the loads, so as to be applied against said loads,

  be lowered by lowering below that rolling plane.

  The control is ensured by pre-

the said charges.

  The major disadvantage of this type of carrier is that it does not accept a very wide range of weight per meter. Indeed, the clutch-disengagement device is connected to the detection device via a set of levers so that there is a linear relationship between the forces required to actuate the detector and

  those that can exert the device clutch-de-device

  clutch and drive belt on the loads to be made

  astern. Therefore, if the sensors are adjusted so that the light loads can act on them, we will obtain a training effort quite low, insufficient for loads

  heavy transported. Conversely, if we set the detection

  In order for heavy loads to be carried away, light loads will not be able to act on said detectors.

  and their presence will not be detected.

  Precedents made to this carrier-

  known accumulator make it possible to eliminate these drawbacks by means of an independent adjustment of the pressure exerted on the

  presence detector and the pressure exerted on the

  clutch-release system of the drive element.

  One of these known devices comprising cam-

  my flats to apply the drive element against the carrier rollers, leads to a very smooth operation

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  because each rotation of the cams

  drive up and down and hit against the rou-

  the carriers. In addition, during the accumulation phase, the drive band of the carrier rollers rubs on the flats of the cams, which consumes energy, wears the belt and

  increases the effort needed to re-engage the mechanism.

  In order to improve this carrier-accumula-

  existing system, it has been developed a system with double cam through which the operation is significantly less noisy because the band is no longer subjected to a pulsed movement and no longer beats against the carrier rollers, but in phase accumulation, said band always rubs on the flats

  of the double cam with the aforementioned drawbacks.

  The object of the present invention is therefore to

  ser a disengageable accumulator transporter, on which the pressure to be exerted on the detector to detect the presence of the charges is independent of the pressure exerted by the clutch-disengagement device of the drive element, and which does not have the various aforementioned disadvantages namely a beat of the noise generating drive member, and a friction of said drive member on the clutch cams, generator of wear and loss of energy. According to the invention, the accumulator conveyor for isolated charges comprises a frame, a sole with load-bearing rollers on which the loads rest and move, at least one endless driving band moving continuously under the carrier rollers and driving the rotation of these by friction, from pressure rotors to

  eccentric pivot axis supporting said drive band

  nally and intended to apply it against the carrier rollers, and charge presence detectors distributed along the sole of the conveyor between the carrier rollers, each

  pressure rotor of said conveyor according to the invention comprising

  both a casing of generally cylindrical general shape pivotally mounted about an eccentric axis and at least one roller or pressure cam rotatably mounted inside the casing and centered with respect to its periphery, the cylindrical wall

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  said housing comprising two windows angularly offset leaving the peripheral surface of the roller, said windows being all located on the same side relative to the diametral plane of the housing which passes through the pivot axis of the rotor. Preferably, one face of each rotor housing comprises two stop pins located at different distances from the axis of pivoting of the rotor, a control strip provided with notches being slidably mounted on the

  chassis of the conveyor, along the face of the housing

  both the stop fingers of each rotor, said strips being each connected to a detector by a control linkage which ensures their displacement parallel to said

faces of the box.

  The invention will now be described in greater detail.

  tail with reference to a particular embodiment given by way of non-limiting example and shown in the accompanying drawings in which: FIG. 1 represents a roller conveyor equipped

  of tape application rotors according to the invention.

  Fig. 2 represents an exploded view of a rotor of

application according to the invention.

  Fig. 3 represents a rear perspective of the

tor of fig. 2.

  Fig. 4 represents the axis of assembly of the rotor on the

  chassis as well as the control strip of said rotor.

  Fig. 5 and 6 schematically illustrate the function-

  the carrier according to the invention.

  Fig. 7 to 10 represent the different positions

  occupied by a rotor according to the invention during operations

  Clutch engagement and disengagement of the drive belt As shown in FIG. 1, the roller conveyor 1 according to the invention comprises a conventional frame 2

  constituted in a manner known per se by an assembly of

  metal trowels, a sole with carrying rollers 3 arranged

  parallel to each other and. able to log

  in bearings carried by the side members

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  of the frame 2, a longitudinal central beam 4 fixed on crosspieces 5 of the frame 2 and supporting rotors 6 for applying driving strips 7, said strip being a continuous strip driven permanently by a motor device not shown and which can be applied by said

  rotors 6 under the rollers 3 of the sole of the conveyor of

  to rotate them. The rotors 6 of application

  cation of strips are pivotally mounted about eccentric axes

  mounted on the central beam 4 parallel to the rotational axes

  3. The lower run of the drive belt 7 is supported by rollers 8 which prevent it.

to float.

  At regular intervals, and intercalated between two adjacent carrier rollers are provided load detectors 9 constituted / 5Rtun single shoe, or by a roller mounted at the end of a lever 10 whose tilting causes the movement of a whole linkage allowing remote control of the lowering of the drive belt 7 out of contact with the carrier rollers 3 or on the contrary its application under said rollers

  to ensure their friction training.

  The essential element of the invention consists of the tape application rotors. 6 of which Figure 2

  offers an exploded view. Each rotor of application or pres-

  The web portion includes a cylindrical housing 11 provided with a central hub 12 concentric with the outer wall 13 of said housing. The hub 12 has an eccentric bore 14 which the

  crosses from side to side parallel to the axis of said hub.

  The generally cylindrical peripheral wall 13 of the housing is indented at two spaced locations so as to form two separate windows 15 and 16

  by a portion of wall 17. This wall 13 presents.to the

  sinage of the window 15, an outer allowance, that is to say that the inner surface of this wall is a cylinder of revolution, while its outer surface is, or a cylinder of revolution eccentric so that the distance

  between the two cylindrical surfaces is maximum in the vicinity

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  the edge of the window 15 which is farthest from the window 16, or a surface of more complicated shape but resulting in an extra thickness in the same place. The housing 11 has a bottom 18 in which is placed the hub 12 and is open on the face opposite said bottom so as to receive a roller 19 comprising

  a bore 20 inside which is housed a roll-

  ball bearing or other 21 whose inner ring 22 is fitted on the hub 12 and retained thereon by a clip 23. When the bearing 21 and the roller 19 have been fitted inside the housing 11, the latter is mounted on its pivot axis 24 (see FIG 4) on which it is retained by a clip 25 (FIG 2) and the housing is closed by

a lid 26.

  On the outer face of the bottom 18 of the housing 11 of the

  rotor are placed two stop or hold pieces respectively

  27 and 28 at different distances from the axis

xy del "bore 14 of the housing.

  When it is housed inside the casing 11, the pressure roller or cam 19 protrudes out of said casing by the two windows 15 and 16 thereof as may be

see it in figure 3.

  The rotor 6 thus assembled can rotate around

  its pivot axis 24 which passes through the hub 12 to the interior

  of the eccentric bore 14. This axis 24 (FIG.

  a threaded shank 29 which serves to fix it rigidly through a hole 30 drilled in the flange of the central beam 4, the connection being effected by means of a nut 31 blocked

  on said threaded shank 29. Along said vertical wing

  the central beam 41 is applied a control strip 32 capable of sliding longitudinally along said vertical flange and parallel to the bottom 18 of the rotors 6. The control strip 32 has a slot 33 which is traversed by the axis 24 of the rotors 6, said strip further comprising a flange folded to the bracket 34 in which is formed a notch 35 of width greater than the diameter of the stop pins 27 and 28 of the rotors 6. When the rotors 6 are mounted on their fixed axes they same on the central beam 4, the flange 34 of the control strip 32 moves on the path traveled by the pins 27 and 28 for retaining rotors and may form an obstacle to the rotation

of these.

  The operation of the device according to the invention is as follows: When no isolated load is transported on the sole of the conveyor according to the invention (see Fig. 5), the carrier rollers 3 are permanently rotated by the belt drive 7 applied against the lower part of said rollers by the application rotors or

  6. The sensor rollers 9 then exceed

  above the plane of the sole of the conveyor as shown in Figure 5, each carrier roller 9 controlling a train of three rotors 6 via the lever 10 and a

linkage 36.

  When isolated charges are transported on the conveyor (FIG. 6), each load presses on a detector 9, rotating the levers 10 associated with these detectors, which has the effect of rearwardly moving the linkage 36, which makes it slide the control strip 32 along the vertical wing of the central beam 4 of the conveyor, said strip 32 having either its wing angle bracket 34 or notch 35 in the path of

  stop pins 27 and 28 of the rotors 6.

  The operation of the clutch and the disengagement of the band is more particularly described below in

  reference to Figures 7 to 10 of the drawings.

  As shown in Figure 7, the housing 11 of the rotor which is pivotally mounted about its eccentric axis 24 is retained by the wing at right angle 34 of the strip 32 which abuts on its stop pin 27. In this position (Figure 7), the drive belt 7 rests on the roller 19

  which protrudes outside the housing 11 by the window 16 thereof.

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  The strip 7 is driven in the direction of the arrow D and the roller 19 rolls without friction along said strip, which largely eliminates the wear thereof. when

  an isolated charge passes on a detector 9, this one is in--

  dark and rotates his lever arm 10 which pushes towards

  the rear control linkage 36, which slides

  the strip 32 along the central beam 4 and position

  not the notch 35 of said strip on the circular path

  The ruler 32 thus allows said pin to escape and the rotor housing tilts about the axis 24 on the combined effect of its own weight and the weight of the strip 7 which rests on the roller 19 The rotation of the housing 11 is interrupted when the second pin 28 abuts against the flange 34 of the strip 32, because said pin moves on a circumference different from that of the pin 28. In this position, (FIG. / the upper level of the rotor as well as the driving belt 7is collapsed by

  relative to the lower plane of the carrier rollers 3 of the

  carrier so that said rollers are no longer driven by the drive band 7 which is no longer in contact with

  their lower part. Then there is disengagement and accumula-

  isolated charges on the carrier.

  When it is necessary to restart

  loadsgun displacement of the strip 32 positions the sample

  crure 35 on the path of the second housing retainer pin 28

  stator tier, so that said pin 28 can escape and the stator continues to rock under its own weight and under the weight of the strip 7 which rests on him (Figure 9). In this position, the strip 7 no longer rests on the pressure roller 19 but comes to rest on the peripheral wall of the housing 11 itself and drives in rotation in the direction

  clockwise the rotor 6 by rubbing at the perimeter.

  11. The rotor then makes three quarter turn and rises so that it again occupies the position it had in FIG. 7, the strip then resting again on the pressure roller 19 which is driven in

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  rotation and thus avoids the wear of said strip, which

  is raised again at the level of the lower plane of the

  carriers 3 against whom it comes into contact with

  ensure their training. There is then clutch and trans-

  carrying charges accumulated on the carrier. Note that the lever arms 10 of the detectors are biased upwards by a return spring

not shown.

  According to a somewhat more complicated variant of embodiment, a roller 19 is not provided, but two rollers both rotating inside the housing 11, each placed at the right of a window, and each carried on

  an axis integral with the bottom 18. This solution allows in particular

  especially to reduce the size of the windows 15 and 16, and therefore to make the wall portion more robust

Intermediate 17.

  In the device according to the invention, the functions

  detecting and clutch-disengaging are separated,

  the first function to control the power of

  on the training belt to ensure the second

  function. There is thus a power amplification that allows

  both to achieve a maximum weight / minimum weight ratio.

  In addition, that one is in the engaged positionp ie in phase transport, or disengaged, ie in phase

  accumulation, the driving belt 7 rolls on the

  let or pressure cam 19 without rubbing on it, the pressure cam being in continuous rotation in position

high as in low position.

  This device is a power sampling device controlled by a low level signal that can raise or lower any organ. For example, in the described device, it is possible to replace a train of

  three rotors 6 by an assembly formed of a rotor and a

  number of idle rolls, these rollers can be lowered

  checked or lifted by another linkage which is itself

  controlled by the rotation of the rotor which has been preserved.

  We can thus multiply the number of points by o the

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  band 7 is raised without unduly increasing the price of

comes back from the set.

  The power captured by the rotor in its movement

  rotation can also be used for other purposes, for example to raise or lower a bumper.

  The device, and in particular the method of taking

  energy flow through the rotation of the rotor, can be used not only in handling, but in all areas o a strong amplification of power,

  combined with limited movement, is necessary.

  Although the scope of the invention is not limited to the only embodiment given previously by way of non-limiting example, but it also covers any variant which would differ only by details of

construction.

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Claims (4)

  1.- accumulator conveyor for isolated loads comprising a frame, a sole with load-bearing rollers on which the loads rest and move, at least one endless drive band moving continuously under the carrier rollers and providing the drive in rotation of   these by friction, pressure rotors with pivot axes   eccentrically supporting said drive belt and intended to apply it against the carrier rollers and load presence detectors distributed along the   sole of the carrier between the carrier rollers, characterized   in that each pressure rotor comprises a substantially cylindrical general housing, pivotally mounted about an eccentric axis and at least one pressure roller or cam rotatably mounted inside the housing, and in that the   cylindrical wall of said housing has two windows   augers excessively leaving the peripheral surface of the roller, said windows being both located on the same side relative to the diametral plane of the casing passing by the pivot axis of the rotor.   2. Carrier according to claim 1, characterized   in that one face of each rotor housing comprises two stop pins located at distances different from 1 '.   axis of rotation of the rotor, in that a control strip   provided with notches is slidably mounted on the frame along the face of the housing carrying the stop fingers of each rotoret in that said strips are each connected to a detector by a control linkage which ensures their displacement parallel to said faces of the housings.   3.- Carrier according to any one of the   1 or 2, characterized in that it comprises a single roller 19 mounted in the housing 11, and centered with respect to the periphery of it 4.- Carrier according to one of the 12 2462365   1 or 2, characterized in that it comprises two   rollers both rotating inside the housing 11   and placed each at the right of a window.   5.- Carrier according to any one of the   1 to 4, characterized in that the energy corresponding to the rotation of the rotor is used to actuate other members, such as additional rollers or a bumper.